DSC
1 VHF
.1 switch off transmitter immediately **;
.2 switch equipment on and set to Channel 16; and
.3 make broadcast to "All Stations" giving the ship's name, call sign and DSC number, and
cancel the false distress alert.
Example
All Stations, All Stations, All Stations
This is NAME, CALL SIGN,
DSC NUMBER, POSITION.
Cancel my distress alert of
DATE, TIME UTC.
= Master NAME, CALL SIGN,
DSC NUMBER, DATE, TIME UTC.
2 MF
.1 switch off equipment immediately **;
.2 switch equipment on and tune for radiotelephony transmission on 2,182 kHz; and
.3 make broadcast to "All Stations" giving the ship's name, call sign and DSC number, and
cancel the false distress alert.
Example
All Stations, All Stations, All Stations
This is NAME, CALL SIGN,
DSC NUMBER, POSITION.
Cancel my distress alert of
DATE, TIME UTC,
= Master NAME, CALL SIGN,
DSC NUMBER, DATE, TIME UTC.
3 HF
As for MF, but the alert must be cancelled on all the frequency bands on which it was transmitted.
Hence, in stage 2.2 the transmitter should be tuned consecutively to the radiotelephony distress
frequencies in the 4, 6, 8, 12 and 16 MHz bands, as necessary.
4 Inmarsat-C
Notify the appropriate RCC to cancel the alert by sending a distress priority message via the same
CES through which the false distress alert was sent.
Example of message
NAME, CALL SIGN, IDENTITY NUMBER, POSITION,
Cancel my Inmarsat-C distress
alert of DATE, TIME UTC
= Master +
5 EPIRBs
If for any reason an EPIRB is activated accidentally, the ship should contact the nearest coast
station or an appropriate coast earth station or RCC and cancel the distress alert.
6 General
6.1 Notwithstanding the above, ships may use any means available to them to inform the
appropriate authorities that a false distress alert has been transmitted and should be cancelled.
6.2 No action will normally be taken against any ship or mariner for reporting and cancelling a
false distress alert. However, in view of the serious consequences of false alerts, and the strict ban
on their transmission, Governments may prosecute in cases of repeated violations.
* Appropriate signals should precede these messages in accordance with the ITU Radio Regulations chapter NIX.
** This applies when the false alert is detected during transmission.